Self contained breathing tank



FIG. 1 is a top left perspective view of a preferred embodiment of theself contained breathing tank;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken line showing the regulator and tube of FIGS. 1 through 6 isfor illustrative purposes only and forms no part of the claimed design.

The ornamental design for a self contained breathing tank, as shown anddescribed.